Coolihg ebigtiohal surfaces



UNITED? STATE@ FATE-NVE OFFIF,

A. DOIG, OF BROOKLYN, NEW YORK.

COOLING FRICTIONAL SURFACES.

Specification of Letters Patent No. 32,823, dated July 16, 1861.

To all whom 'it may concern:

Be it known that I, A. Dore, of'the city of Brooklyn, county of Kings,and State of New York, have invented a new and useful Improvement inCooling the Frictional Surfaces of Machinery to Prevent Them fromBecoming Unequally Heated and from Injurious I/Vearing; and I herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the annexed drawings, forming a part ofthis specification, in which Figure l is a vertical longitudinal sectionof a shaft and water reservoir showing the improvement; Fig. 2 is atransverse end section of a journal box showing the improvement, andFigs. 3 and 4: are sections of the journal box, the latter figure beinga top view.

Similar letters refer to like parts on the figures.

rIhe nature of my invention consists of a cellular journal box for theshafting of engines, `especially those of steam boats and ships,'constructed with a web (or webs) forming chambers communicating with oneanother, and through which a current of water is made to flow, for thepurpose of keeping the frictional surfaces cool without bringing thewater into contact with them; and also securing sufficient strength inthe boxes to sustain the heaviest shafting without crushing.

To enable others skilled in the art to make and use my invention I willdescribe it as clearly and succinctly as possible, and to do thisintelligently I will first describe the common mode of coolingfrictional surfaces with water and point out its defects.

The frictional surfaces of shafts and j ournal boxes, especially thoseof steam ships are liable to become overheated. To obviate this evil, astream of water is usually applied to them directly on the outside ofthe journal-box and shaft. This is a defective method, as, either fromunequal heating and cooling, or the action of the water upon a shaftformed with an interior water passage B, which communicates with areservoir C, containing water.

D, is the journal of the shaft, in which the water passage is enlargedinto a chamber E, for the purpose of obtaining a greater amount ofcooling surface near where the heat is generated. rlhe water passageextends from the reservoir down into the center of the shaft, andthrough the crank F, into the bent tube or siphon Gr, at the outer endof which the water is discharged. The passage from the reservoir to thejournal box may be made quite short. A. stuffing box II, is placed wherethe water is admitted from the reservoir to the water passage in theshaft. A continual stream of water is made to iow from the reservoirthrough the journal of the shaft, when the latter is revolving, and theheat generated by the friction is thus absorbed from all the frictionalsurfaces equally and carried off without bringing the cooling agent intodirect contact with the frictional surfaces.

In Figs. 2, 3 and @L I represents a journalbox formed with enlargedinterior water passages or chambers J J which communicate with oneanother as shown.

WV is a web or rib of metal cast with the box, having an opening 0through it, said web dividing the box into chambers, and tending to makeit very strong to sustain the weight of the shaft.

K is a pipe by which water is admitted from any suitable source and Ilis the one by which it is discharged. The water is admitted at a pointlower than where it is discharged so that a current is thus maintainedthroughout the entire chambers of the box. An extensive cooling surfaceis thus also secured and an equal refrigerating action obtained on allthe frictional surfaces.

Journal boxes of a different form from that represented in the drawingsmay be employed to suit different cases. As these boxes are usuallydivided into two sections, which are usually bolted together to securethe shaft, the upper section, as well as the lower one, may beconstructed as shown and described. The construction and arrangement ofthe shafting journal and the journal boxes according to my invention, asshown and described, also the whole operation and its attendant results,will be nnanti boiiow spaces, constituting a leeiiula'rl derstood byengineers and machinists Withjournal-box with Water chambers to e001 the1G out further enlarging on the subject. frictional surfaces,substantially as and for Having thus described my invention I thepurpose set fort-h. Y

e1aim- A; DOG.-

The Combination and arrangement of a Witnesses:

journal-box for the heavy shafting of steam JAMES W. TAYLOR,

engines7 formed with an interior webbing JOHN W. LITTLE.

